Keyless/Power Door Locks/Security System Symptom Troubleshooting - The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed
The horn does not sound and/or the headlights do not flash when the PANIC button on the remote is pressed
NOTE: Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.

1.
Determine possible failure area (MICU, others):

Determine possible failure area (MICU, others)
?1.
Press the PANIC button.

Do the horns sound?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 2.
2.
Horn operation check:

Horn operation check
?1.
Press the horn button.

Do the horns sound?

     
YES
     
     
     
Replace the remote, then register the new transmitter.?
     
NO
     
     
     
Check the horn circuit.?
3.
MICU check:

MICU check
?1.
Turn the headlight switch ON.

Do the headlights come on?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
Check the lighting circuit. Do the MICU input test.?